Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 06-27-2012, 11:36 AM   #1
Rkh
Registered User
 
Rkh's Avatar
 
Ford Super Duty Owner
Join Date: Jul 2011
Posts: 1,063
Bad air pressure reading off of valve stem extender?

As I was doing a routine tire pressure check at camp, my inside rear tire was reading only 20 psi...It has a braided style extender..The tire did not need air and it was obvious it had far more than 20psi. Is this typical of these valve extenders to read faulty?
__________________

__________________
Rkh is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-27-2012, 02:50 PM   #2
Senior Member
 
Join Date: May 2010
Location: La Marque, Texas
Posts: 146
Not usually. I would ask them to replace the sensor.
__________________

__________________
homerbw is offline   Reply With Quote
Old 06-27-2012, 03:50 PM   #3
Senior Member
 
Sky_Boss's Avatar


 
Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,069
Quote:
Originally Posted by Rkh View Post
As I was doing a routine tire pressure check at camp, my inside rear tire was reading only 20 psi...It has a braided style extender..The tire did not need air and it was obvious it had far more than 20psi. Is this typical of these valve extenders to read faulty?
You don't mention whether or not this is with a TPMS or not.

If you don't have a TPMS, then make sure you have your extenders properly seated. This was something I ran into.

If you have a TPMS double check the seating first and then try a different sensor to see if that is replicated. If you get the same reading, then it is probably specific to your valve extender set up. There is some recent discussion on the TST TPMS thread where it says it could be possible that your valve core stem is too deep to activate the sensor properly. If that is the case, backing off the core a turn might fix your problem. I suppose that theory could be true for your valve stem too.

BTW...I went through a similar situation adding extenders and I SWORE my tire wasn't flat....I WAS WRONG! LOL I hadn't seated my extender properly.
__________________
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is offline   Reply With Quote
Old 06-27-2012, 03:59 PM   #4
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
homerbw, who's "them" and what "sensor" are you typing about that he didn't even mention having?
__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner is offline   Reply With Quote
Old 06-27-2012, 05:29 PM   #5
Rkh
Registered User
 
Rkh's Avatar
 
Ford Super Duty Owner
Join Date: Jul 2011
Posts: 1,063
No TPMS...I was checking with a quality truck tire gauge. All other tires were fine accept this one.
__________________
Rkh is offline   Reply With Quote
Old 06-27-2012, 06:14 PM   #6
Senior Member
 
Sky_Boss's Avatar


 
Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,069
Quote:
Originally Posted by Rkh View Post
No TPMS...I was checking with a quality truck tire gauge. All other tires were fine accept this one.
Are you SURE it hasn't lost air? Did you thump it with a tire billy and hear any differences? I was sure my tire wasn't lacking air until I thumped it.
__________________
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is offline   Reply With Quote
Old 06-27-2012, 07:46 PM   #7
Rkh
Registered User
 
Rkh's Avatar
 
Ford Super Duty Owner
Join Date: Jul 2011
Posts: 1,063
Yes, I thumped the hell out of it...No difference. I haven't moved the coach yet. I will be buying a compressor first to see if it really needs air. I don't trust my thumps but I would bet my pitiful retirement check that it is full.
__________________
Rkh is offline   Reply With Quote
Old 06-27-2012, 07:52 PM   #8
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
The only time a tire is full, is right before it blows up. Have you tested that yet?
__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner is offline   Reply With Quote
Old 06-27-2012, 08:05 PM   #9
Rkh
Registered User
 
Rkh's Avatar
 
Ford Super Duty Owner
Join Date: Jul 2011
Posts: 1,063
Dunner..... HUH?
__________________
Rkh is offline   Reply With Quote
Old 06-27-2012, 08:18 PM   #10
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
You said:

Quote:
Originally Posted by Rkh View Post
I don't trust my thumps but I would bet my pitiful retirement check that it is full.
__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner is offline   Reply With Quote
Old 06-27-2012, 08:29 PM   #11
Senior Member
 
Craig_R's Avatar
 
Monaco Owners Club
Join Date: Jan 2011
Location: Huson, MT
Posts: 1,043
Quote:
Originally Posted by Rkh View Post
Yes, I thumped the hell out of it...No difference. I haven't moved the coach yet. I will be buying a compressor first to see if it really needs air. I don't trust my thumps but I would bet my pitiful retirement check that it is full.
I wouldn't be to quick to bet that retirement check. I'd disconnect that braided extension and take another reading with that quality truck tire gauge. 20 pounds of air in a truck/bus tire is considered flat and only someone who is experienced in thumping a tire would be able to actually discern the difference between 20 pounds and 120 pounds pressure without a gauge.

Just my 2 cents...
__________________
Craig & Donna
2005 Beaver Monterey Laguna IV (aka The Hotel Monterey)
2011 Jeep Liberty Limited
Craig_R is offline   Reply With Quote
Old 06-27-2012, 08:31 PM   #12
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
Michelin considers 20 pounds under recommended tire pressure as "Run Flat". They use that term to deny claims for manufacturer defects.
__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner is offline   Reply With Quote
Old 06-28-2012, 08:34 AM   #13
Senior Member
 
Join Date: Nov 2005
Posts: 3,336
Quote:
Originally Posted by Rkh View Post
As I was doing a routine tire pressure check at camp, my inside rear tire was reading only 20 psi...It has a braided style extender..The tire did not need air and it was obvious it had far more than 20psi. Is this typical of these valve extenders to read faulty?

We had a similar problem with braided extenders a few years ago. It turned out the ones we had (don't know the brand, they came with the coach) had a little o ring gasket where it screwed onto the valve stem. When they were installed the o ring on one didn't slip over the threads on the stem. It just lodged between the extender and the stem preventing the core in the extender from fully depressing the core in the valve stem. I removed the extender, put a dab of dish soap on the o ring and reinstalled the extender. It slipped right over the valve stem and the pressure readings were correct.

If this is your problem and lubrication is required don't use a petroleum based lubricant on the o ring. Over time it'll deteriorate the o ring and cause it to leak.
__________________
Hikerdogs
2013 Adventurer 32H
Hikerdogs is offline   Reply With Quote
Old 06-29-2012, 08:45 PM   #14
Rkh
Registered User
 
Rkh's Avatar
 
Ford Super Duty Owner
Join Date: Jul 2011
Posts: 1,063
OK, I really need some help understanding how these extended valve stems work. As I originally posted, I believe my tire has air by using the thump test. Tire Gauge reads zero. I unscrewed the valve body and pulled it out. I was surprised to find it is attached to a 5 inch long flex rod. No air came out of the tire. I re-installed the valve body and when depressing the pressure release needle, no air comes out...I had attached a compressor and ran this tire up and I'm now afraid its over inflated..What am I missing here? This braided valve stem appears to connect directly to the inner wheel rim, not screwed onto an existing valve stemmm
__________________

__________________
Rkh is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:23 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.